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PROPRIETARY AND CONFIDENTIAL DRAFT 28/Feb/03

Introduction
1
Chapter 1: Introduction

Glossary of Component Terms

The codes in both the National Fire Protection Association (NFPA) 99 and
CAN/CSA-Z305.1-92 standards refer to the main components of alarm
systems. However, they use different naming conventions. Where applicable in
the following definitions, the CAN/CSA-Z305.1-92 name is in parentheses
following the NFPA 99 name.

1. Master Alarm (Emergency Alarm)—The Master Alarm monitors the
operation and condition of medical gas source supplies and reserve
supplies. If the Network Communications Board is installed in the Area
Alarm, the Master Alarm can monitor the operation and condition of
MedPlus TotalAlert™ Area Alarm Modules.

There are two dry-contact relays featured on the Master Alarm that provide
signals to outputs. The outputs can be wired to either the normally-closed
or normally-open contacts. They are located on the Master Alarm Breakout
P.C. Board. One is marked MAIN ALARM, and the other is marked AUX
ALARM. For wiring diagrams, refer to the foldouts at the rear of this
manual.

• MAIN ALARM RELAY

• When the Master Alarm is in alarm condition, this relay activates.

• When the Master Alarm is silenced, this relay deactivates.

• When the Master Alarm power is off, this relay activates until the
power comes back on.
• AUX ALARM RELAY

• When the Master Alarm is in alarm condition, this relay activates.

• When the Master Alarm is silenced, this relay stays activated.

• When the Master Alarm condition is remedied, this relay deactivates.

The Master Alarm also has an output relay that can be used to interface with a
building automation system.

According to the NFPA 99 standard, two Master Alarms are required for
Level 1 facilities. One is usually located in the facility engineer’s office, and
the other is located in an area that has 24-hour supervision. The Master Alarm
consists of the Master Alarm Front Panel and the Master Alarm Rough-In
Assembly.

MedPlus TotalAlert™ Alarm Network Operation and Maintenance Manual (man291ra) Page 1 - 9